Rockmont Electronics Digital Wireless DVR Security System with 7 Inch LCD Monitor, SD Card Recording and 4 Night Vision Cameras Digital Wireless, No interference, No messy wiring. 7" LCD Monitor with 800*480 High Resolution. Viewing mode: Single, Quad, Manual, Automatic switch. Night Vision and Color Camera. SD Card Recording. Support up to 32G SD Card. For more details of this system, please google ROCKMOUNT ELECTRONICS